کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1282377 | 1497565 | 2012 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: XPS valence band studies of hydrogen storage nanocomposites XPS valence band studies of hydrogen storage nanocomposites](/preview/png/1282377.png)
In this work, the electronic properties of hydrogen storage LaNi5/A (A = 10 wt.% C, Cu, Pd, Ni) materials and LaNi5+Mg1.5Mn0.5Ni, LaNi3.75Mn0.75Al0.25Co0.25 + Mg1.5Mn0.5Ni nanocomposites were studied. Results showed that the XPS valence bands measured for mechanically alloyed nanocrystalline alloys and nanocomposites showed a significant broadening compared to those obtained for microcrystalline materials with the same chemical compositions. Furthermore, the surface segregation process of La atoms in LaNi5/Pd nanocomposites is stronger compared to that observed for the nanocrystalline LaNi5 alloy thin films.
► The significant broadening of XPS valence bands.
► The surface segregation process of La atoms in LaNi5/Pd nanocomposites.
► Strong modifications of the electronic structure.
Journal: International Journal of Hydrogen Energy - Volume 37, Issue 4, February 2012, Pages 3659–3664